Machine-dependent compensation in ink units and dampening units

A technology of ink and speed compensation, applied in general parts of printing machinery, printing presses, rotary printing presses, etc., can solve the problem of the influence of wetting agent measurement

Active Publication Date: 2016-05-18
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been found in practice that there are additional influencing variables which have an influence on the ink metering and dampening agent metering when the printing speed is changed

Method used

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  • Machine-dependent compensation in ink units and dampening units
  • Machine-dependent compensation in ink units and dampening units
  • Machine-dependent compensation in ink units and dampening units

Examples

Experimental program
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Embodiment Construction

[0021] exist figure 1 The printing machine 1 is shown as having two printing units 3 , 4 which each have an inking unit 16 , 17 and a dampening unit 18 , 19 . The ink units 16 , 17 are used for ink metering and have servo motors which are connected to the control computer 5 of the printing press 1 . The ink metered into the ink units 16 , 17 can be dampened by means of the dampening units 18 , 19 . The dosing of dampening medium into the dampening devices 18 , 19 can also be controlled by the control computer 5 . In the printing units 3 , 4 the metered and dampened ink is first transferred to the plate cylinders 11 , 12 with printing plates and from there to the blanket cylinders 13 , 26 . From there, the printed image is then transferred in the printing nip between the blanket cylinders 13 , 26 and impression cylinders 10 , 28 onto the printed sheet 9 in the printing press 1 . The printing material 9 is transferred between the two printing units 3 , 4 by means of a transpo...

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PUM

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Abstract

A method for controlling the inking in a printing press includes compensation of an ink requirement in an inking unit and / or compensation of a dampening solution requirement in a dampening unit of the printing press in the event of a change in the printing speed. The printing speed profile or machine state prevailing before the instant of the change in the printing speed is taken into consideration in the compensation of the metering of ink or dampening solution.

Description

technical field [0001] The invention relates to a method for controlling color matching in a printing press when the printing speed changes by compensating the ink requirement in the ink unit of the printing press and / or compensating the dampening medium requirement in the dampening unit of the printing press. Background technique [0002] In offset printing presses, a satisfactory print quality only occurs when the ink metering and dampening medium metering are adapted to the printing subject and adjusted correctly in the continuous printing phase. As soon as the continuous brushing speed of the printing press is changed, the ink metering and dampening medium metering must be adapted. Waste pages occur during this transition phase, so when developing ink control systems in offset printing presses an effort is made to keep said transition phase when the speed is changed as short as possible. One solution is the so-called speed compensation, which is disclosed by the publica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/10B41F33/12
CPCB41F7/24B41F31/12B41F31/13
Inventor P·埃尔特N·普法伊费尔
Owner HEIDELBERGER DRUCKMASCHINEN AG
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